Trimerite Mineral Data + 
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- 51.2.1.1 Trimerite CaMn2Be3(SiO4)3 P 21/c 2/m
- 51.2.1.2 Larsenite PbZnSiO4 Pnam 2/m 2/m 2/m
- 51.2.1.3 Esperite PbCa3Zn4(SiO4)4 B21/m 2/m
- VIII/A.03-10 Trimerite CaMn2Be3(SiO4)3 P 21/c 2/m
- VIII/A.03-20 Esperite PbCa3Zn4(SiO4)4 B21/m 2/m
- VIII/A.03-30 Larsenite PbZnSiO4 Pnam 2/m 2/m 2/m
General Trimerite Information |
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 Chemical Formula: |
CaMn2Be3(SiO4)3 | ||
| Composition: |
Molecular Weight = 453.24 gm | ||
| Calcium 8.84 % Ca 12.37 % CaO | |||
| Manganese 24.24 % Mn 31.30 % MnO | |||
| Beryllium 5.97 % Be 16.56 % BeO | |||
| Silicon 18.59 % Si 39.77 % SiO2 | |||
| Oxygen 42.36 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
CaMn2+2Be3(SiO4)3 | ||
| IMA Status: |
Valid Species (Pre-IMA) 1890 | ||
| Locality: |
Vermland, Sweden. Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 100082 | ||
| PDF 17-477 | |||
Trimerite Image | |||
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Images:
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Trimerite Crystallography |
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| Axial Ratios: |
a:b:c =2.1522:1:3.664 | ||
| Cell Dimensions: |
a = 16.4, b = 7.62, c = 27.92, Z = 16; beta = 90.15° V = 3,489.09 Den(Calc)= 3.45 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.764(1), 3.56(0.4), 2.229(0.35), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Trimerite |
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| Cleavage: |
[001] Good | ||
| Color: |
Colorless, Yellowish red, Pink. | ||
| Density: |
3.474 | ||
| Diaphaniety: |
Transparent to translucent | ||
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. | ||
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
| Habit: |
Pseudo Hexagonal - Crystals show a hexagonal outline. | ||
| Habit: |
Tabular - Form dimensions are thin in one direction. | ||
| Hardness: |
6-7 - Orthoclase-Quartz | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Trimerite |
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| Gladstone-Dale: |
CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2087,KPDmeas= 0.2073,KC= 0.2101 |
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| Optical Data: |
Biaxial (-), a=1.715, b=1.72, g=1.725, bire=0.0100, 2V(Calc)=88, 2V(Meas)=83. | ||
Calculated Properties of Trimerite |
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| Electron Density: |
relectron=3.35 gm/cc |
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| Fermion Index |
Fermion Index = 0.06865 Boson Index = 0.93135 |
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| Photoelectric: |
PETrimerite = 8.06 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Trimerite is Not Radioactive |
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Trimerite Classification |
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| Dana Class: |
51.2.1.1 (51)Nesosilicate Insular SiO4 Groups Only | ||
| (51.2)with cations in [4] as well as >[4] | |||
| (51.2.1)Trimerite group | |||
| Strunz Class: |
VIII/A.03-10 VIII - Silicates | ||
| VIII/A - Nesosilicates, with [SiO4]4- groups, cations of tetrahedric orientation [4] | |||
| VIII/A.03 - Trimerite - Larsenite series | |||
Other Trimerite Information |
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| References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Trimerite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Trimerite using: Visit our Advertisers for Trimerite : Translate Trimerite Mineral Data : Ask about Trimerite here : Print or Cut-and-Paste your Trimerite Specimen Label here :
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